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| Insert the resetting tool -T 10165 - in such a way that the collar is resting on the piston. |
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| Release the piston by turning the knurled wheel of the resetting tool -T 10165 - to the left. |
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| Use open-jawed spanner on a provided spanner surface -arrow A- if the piston is difficult to move. |
Note Make sure that the cylinder surface is not damaged when removing the gasket ring. |
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